Use "Admin Username" value (instead of default 'root') along with the
cloud public key if "Admin Password" is empty
clean code
add check methods for validating user input (instance name, retention
time, delay...)
Fix excess workload logic to not spawn as many instances
Take the planned nodes into account when checking the instancecap.
Fix NPE when label is null
Merge pull request #48 from ccin2p3/Bug5133_Admin_Username

use "Admin Username" value (instead of default 'root') along with the cloud public key if "Admin Password" is empty
Merge pull request #50 from ccin2p3/Bug5128_check_instance_name

add check methods for validating user input (instance name, retention
Merge pull request #51 from spark404/instancecap

Take the planned nodes into account when checking the instancecap.